<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        @keyframes rotate {
            0%{
                transform: rotate(0);
            }
            100%{
                transform: rotate(360deg);
            }
        }
        .active{
            animation: rotate 10s;
        }
    </style>
</head>
<body>
    <div class="active">hehe</div>
</body>
</html>
